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Wu BT, An N, Yang YW, Huang ZZ, Feng JF. [Further understanding and paying attention to normoalbuminuric diabetic kidney disease]. Zhonghua Yu Fang Yi Xue Za Zhi 2023; 57:1663-1673. [PMID: 37859387 DOI: 10.3760/cma.j.cn112150-20230404-00256] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 10/21/2023]
Abstract
Diabetes mellitus (DM) has grown up to be an important issue of global public health because of its high incidence rate. Diabetic kidney disease (DKD) is the main cause of end-stage kidney disease (ESKD). Therefore, early diagnosis and timely prevention and treatment of DKD are essential for the progress of DM. The clinical diagnosis and staging of DKD are mostly based on the urinary albumin excretion rate (UAER) and estimated glomerular filtration rate (eGFR). However, clinically, DKD patients show normoalbuminuric diabetic kidney disease (NADKD) instead of clinical proteinuria. The old NADKD concept is no longer suitable and should be updated accordingly with the redefinition of normal proteinuria by NKF/FDA (National Kidney Foundation/Food and Drug Administration). Based on the relevant guidelines of DM and chronic kidney disease (CKD) and combined with the current situation of clinical research, the review described NADKD from the aspects of epidemiology, pathological mechanism, disease diagnosis, clinical characteristics and biomarkers, to arouse the new understanding of NADKD in the medical profession and pay attention to it.
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Affiliation(s)
- B T Wu
- Department of Clinical Laboratory, Mianyang Central Hospital, School of Medicine, University of Electronic Science and Technology of China, Mianyang 621000, China
| | - N An
- Department of Clinical Laboratory, Mianyang Central Hospital, School of Medicine, University of Electronic Science and Technology of China, Mianyang 621000, China
| | - Y W Yang
- Department of Clinical Laboratory, Mianyang Central Hospital, School of Medicine, University of Electronic Science and Technology of China, Mianyang 621000, China
| | - Z Z Huang
- Department of Clinical Laboratory, Mianyang Central Hospital, School of Medicine, University of Electronic Science and Technology of China, Mianyang 621000, China
| | - J F Feng
- Department of Clinical Laboratory, Mianyang Central Hospital, School of Medicine, University of Electronic Science and Technology of China, Mianyang 621000, China
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Li TY, Zhang J, Li MM, An N, Pan Q. [Diabetes insipidus as the onset manifestation of IgG 4-related disease: a case report]. Zhonghua Nei Ke Za Zhi 2022; 61:324-326. [PMID: 35263976 DOI: 10.3760/cma.j.cn112138-20210615-00422] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Affiliation(s)
- T Y Li
- Graduate School of Peking Union Medical College, Department of Endocrinology, Beijing Hospital, Beijing 100730, China Department of Endocrinology,Beijing Hospital,National Center of Gerontology,Institute of Geriatric Medicine,Chinese Academy of Medical Sciences, Beijing 100730, China
| | - J Zhang
- Department of Endocrinology,Beijing Hospital,National Center of Gerontology,Institute of Geriatric Medicine,Chinese Academy of Medical Sciences, Beijing 100730, China
| | - M M Li
- Graduate School of Peking Union Medical College, Department of Endocrinology, Beijing Hospital, Beijing 100730, China Department of Endocrinology,Beijing Hospital,National Center of Gerontology,Institute of Geriatric Medicine,Chinese Academy of Medical Sciences, Beijing 100730, China
| | - N An
- Department of Endocrinology,Beijing Hospital,National Center of Gerontology,Institute of Geriatric Medicine,Chinese Academy of Medical Sciences, Beijing 100730, China
| | - Q Pan
- Graduate School of Peking Union Medical College, Department of Endocrinology, Beijing Hospital, Beijing 100730, China Department of Endocrinology,Beijing Hospital,National Center of Gerontology,Institute of Geriatric Medicine,Chinese Academy of Medical Sciences, Beijing 100730, China
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Xu L, Zhong M, Yang Y, Wang M, An N, Xu X, Zhu Y, Li Z, Chen H, Zhao R, Zheng X. Correction to: Adult‑onset vanishing white matter in a patient with EIF2B3 variants misdiagnosed as multiple sclerosis. Neurol Sci 2021; 43:2911. [PMID: 34932162 DOI: 10.1007/s10072-021-05767-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Lulu Xu
- Department of Geriatric Medicine, the Affiliated Hospital of Qingdao University, 16 Jiangsu Road, Qingdao, 266000, Shandong, China
| | - Meixiang Zhong
- Department of Geriatric Medicine, the Affiliated Hospital of Qingdao University, 16 Jiangsu Road, Qingdao, 266000, Shandong, China
| | - Yuyuan Yang
- Department of Geriatric Medicine, the Affiliated Hospital of Qingdao University, 16 Jiangsu Road, Qingdao, 266000, Shandong, China
| | - Meng Wang
- Department of Geriatric Medicine, the Affiliated Hospital of Qingdao University, 16 Jiangsu Road, Qingdao, 266000, Shandong, China
| | - Nina An
- Department of Geriatric Medicine, the Affiliated Hospital of Qingdao University, 16 Jiangsu Road, Qingdao, 266000, Shandong, China
| | - Xin Xu
- Department of Neurology, the Affiliated Hospital of Qingdao University, 16 Jiangsu Road, Qingdao, 266000, Shandong, China
| | - Yufeng Zhu
- Department of Graduate School, Qinghai University, Xining, 810016, Qinghai, China
| | - Zengwen Li
- Department of Radiology, Gaomi Municipal Hospital, Gaomi, 261500, Shandong, China
| | - Huili Chen
- Department of Ophthalmology, Yijishan Hospital of Wannan Medical College, Wuhu, 241000, China
| | - Renliang Zhao
- Department of Neurology, the Affiliated Hospital of Qingdao University, 16 Jiangsu Road, Qingdao, 266000, Shandong, China.
| | - Xueping Zheng
- Department of Geriatric Medicine, the Affiliated Hospital of Qingdao University, 16 Jiangsu Road, Qingdao, 266000, Shandong, China.
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Xu L, Zhong M, Yang Y, Wang M, An N, Xu X, Zhu Y, Li Z, Chen H, Zhao R, Zheng X. Adult-onset vanishing white matter in a patient with EIF2B3 variants misdiagnosed as multiple sclerosis. Neurol Sci 2021; 43:2659-2667. [PMID: 34755279 DOI: 10.1007/s10072-021-05710-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Accepted: 10/29/2021] [Indexed: 11/26/2022]
Abstract
BACKGROUND Vanishing white matter (VWM) is an autosomal recessive disorder characterized by childhood ataxia with central hypomyelination. Adult-onset VWM should be considered as a differential diagnosis for suspected cases of multiple sclerosis (MS). METHODS Targeted region sequencing (TRS) and Sanger sequencing validation were performed to identify and validate the likely pathogenic mutations in a family with VWM. RESULTS The main clinical manifestations of the proband included decreased vision and sleepiness accompanied by atrophy of the corpus callosum, affected inner rim of the corpus callosum, decreased apparent diffusion coefficient value or persistent hyperintensity-diffusion-weighted imaging, atrophied optic nerve, and no recordable visual evoked potentials. Due to the slow development and atypical VWM image features, MS was initially suspected. After prednisone was administered, the patient's condition did not improve significantly, and other diseases were considered. The TRS and Sanger sequencing identified compound heterozygous mutations of EIF2B3 in the proband; c.965C > G /p.Ala322Gly in exon 8 and c.130G > A/p.Glu44Lys in exon 2 were missense mutations inherited from the mother and father, respectively. The proband's oldest brother had the same compound heterozygous mutations but showed no symptoms. CONCLUSION This is the first report of adult-onset VWM in a Chinese family. Initially, MS was suspected, and genetic testing confirmed the diagnosis of VWM. This study may further broaden the clinical spectrum of EIF2B3, thus providing a foundation for further research on the pathogenesis and genetic therapy for VWM.
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Affiliation(s)
- Lulu Xu
- Department of Geriatric Medicine, the Affiliated Hospital of Qingdao University, 16 Jiangsu Road, Qingdao, 266000, Shandong, China
| | - Meixiang Zhong
- Department of Geriatric Medicine, the Affiliated Hospital of Qingdao University, 16 Jiangsu Road, Qingdao, 266000, Shandong, China
| | - Yuyuan Yang
- Department of Geriatric Medicine, the Affiliated Hospital of Qingdao University, 16 Jiangsu Road, Qingdao, 266000, Shandong, China
| | - Meng Wang
- Department of Geriatric Medicine, the Affiliated Hospital of Qingdao University, 16 Jiangsu Road, Qingdao, 266000, Shandong, China
| | - Nina An
- Department of Geriatric Medicine, the Affiliated Hospital of Qingdao University, 16 Jiangsu Road, Qingdao, 266000, Shandong, China
| | - Xin Xu
- Department of Neurology, the Affiliated Hospital of Qingdao University, 16 Jiangsu Road, Qingdao, 266000, Shandong, China
| | - Yufeng Zhu
- Department of Graduate School, Qinghai University, Xining, 810016, Qinghai, China
| | - Zengwen Li
- Department of Radiology, Gaomi Municipal Hospital, Gaomi, 261500, Shandong, China
| | - Huili Chen
- Department of Ophthalmology, Yijishan Hospital of Wannan Medical College, Wuhu, 241000, China
| | - Renliang Zhao
- Department of Neurology, the Affiliated Hospital of Qingdao University, 16 Jiangsu Road, Qingdao, 266000, Shandong, China.
| | - Xueping Zheng
- Department of Geriatric Medicine, the Affiliated Hospital of Qingdao University, 16 Jiangsu Road, Qingdao, 266000, Shandong, China.
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McCabe M, An N, Aboulhosn J, Schwarzenberger J, Canobbio M, Vallera C, Hong R. Anesthetic management for the peripartum care of women with Fontan physiology. Int J Obstet Anesth 2021; 48:103210. [PMID: 34425324 DOI: 10.1016/j.ijoa.2021.103210] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/05/2020] [Revised: 06/21/2021] [Accepted: 07/22/2021] [Indexed: 11/27/2022]
Abstract
BACKGROUND As outcomes for surgical palliation have improved, women with single ventricle congenital heart disease are surviving into their reproductive years and may become pregnant. The cardiovascular changes of pregnancy may stress the Fontan circulation and pose significant risk to the mother and fetus. METHODS Pregnant women with Fontan physiology were identified from the Ahmanson/UCLA Adult Congenital Heart Disease Center database. A total of 37 pregnancies were identified between 2000 and 2019. Twenty live births from 19 patients were reviewed and compared for cardiac history, obstetric history, anesthetic management and cardiovascular outcomes. RESULTS Median gestational age at delivery was 35 weeks. Ten of 20 births were by cesarean delivery. An epidural technique was used as the primary anesthetic for 19 deliveries and general anesthesia was used for one cesarean delivery. An arterial line was placed in the peripartum period for three deliveries. Central venous access was established in the peripartum period for one patient. The mean blood loss for cesarean deliveries was 626 mL (range 240-1200 mL). The mean net peri-operative intake/output was positive 93.5 mL. Three patients were briefly transferred to the intensive care unit postpartum for higher level monitoring and care. CONCLUSION Epidural anesthesia is safe and effective for both vaginal and cesarean deliveries. Judicious fluid management is critical in minimizing postpartum cardiovascular complications. Many patients do not require a higher level of care, invasive monitoring or central venous access during the peripartum period.
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Affiliation(s)
- M McCabe
- Loma Linda University, Department of Anesthesiology, Los Angeles, CA, USA
| | - N An
- UCLA, Department of Anesthesiology and Perioperative Medicine, CA, USA.
| | - J Aboulhosn
- Ahmanson/UCLA Adult Congenital Heart Disease Center, CA, USA
| | - J Schwarzenberger
- UCLA, Department of Anesthesiology and Perioperative Medicine, CA, USA
| | - M Canobbio
- Ahmanson/UCLA Adult Congenital Heart Disease Center, CA, USA
| | - C Vallera
- UCLA, Department of Anesthesiology and Perioperative Medicine, CA, USA
| | - R Hong
- UCLA, Department of Anesthesiology and Perioperative Medicine, CA, USA
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Wang S, Feng W, Liu J, Wang X, Zhong L, Lv C, Feng M, An N, Mao Y. Alginate oligosaccharide alleviates senile osteoporosis via the RANKL-RANK pathway in D-galactose-induced C57BL/6J mice. Chem Biol Drug Des 2021; 99:46-55. [PMID: 34145772 PMCID: PMC9544009 DOI: 10.1111/cbdd.13904] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Accepted: 06/06/2021] [Indexed: 11/30/2022]
Abstract
Osteoporosis is a systemic skeletal disorder characterized by reduced bone mineral density (BMD) and bone quality and increased bone porosity, which increase the risk of bone fracture. Inflammation, one of the important mechanisms related to aging, is associated with osteoporosis. Treatment with anti‐inflammatory agents is effective for alleviating senile osteoporosis. Alginate oligosaccharide (AOS) can prevent and treat diseases related to inflammation, oxidative stress, and immunity. This study evaluates the effect of AOS on osteoporosis and investigates the underlying mechanism. Osteoporosis model was induced by D‐galactose (D‐gal) (200 mg kg−1 day−1) for eight weeks. Three groups were administered via AOS (50, 100, and 150 mg kg−1 day−1) for four weeks, while a control group received sterile water (5 ml kg−1 day−1) for 8 weeks. The results showed that AOS improved bone density and bone microstructure in D‐gal‐induced osteoporosis mice. AOS inhibited osteoclast proliferation, probably through the suppression of receptor activator of nuclear factor‐kappa B ligand (RANKL)‐associated nuclear factor kappa B (NF‐κB) and c‐Fos signaling pathway. AOS also increased osteoprotegerin (OPG) expression and competitively inhibited the binding between RANK and RANKL in senile osteoporosis. Further, AOS decreased the secretion of serum osteocalcin and reduced bone conversion. Together, these results demonstrate the anti‐osteoporosis activity of AOS in mice with osteoporosis.
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Affiliation(s)
- Shan Wang
- Department of Geriatric Medicine, The Affiliated Hospital of Qingdao University, Qingdao, 266000, China
| | - Wenjing Feng
- Department of Geriatric Medicine, The Affiliated Hospital of Qingdao University, Qingdao, 266000, China.,Department of Epidemiology and Health Statistics, The School of Public Health of Qingdao University, Qingdao, 266021, China
| | - Jianya Liu
- Department of General Practice, Anyang District Hospital of Puyang City, Anyang, 455000, China
| | - Xufu Wang
- Department of Nuclear medicine, The Affiliated Hospital of Qingdao University, Qingdao, 266000, China
| | - Lina Zhong
- Department of Geriatric Medicine, The Affiliated Hospital of Qingdao University, Qingdao, 266000, China
| | - Chengxiu Lv
- Department of Geriatric Medicine, The Affiliated Hospital of Qingdao University, Qingdao, 266000, China
| | - Meiping Feng
- Department of Geriatric Medicine, The Affiliated Hospital of Qingdao University, Qingdao, 266000, China
| | - Nina An
- Department of Geriatric Medicine, The Affiliated Hospital of Qingdao University, Qingdao, 266000, China
| | - Yongjun Mao
- Department of Geriatric Medicine, The Affiliated Hospital of Qingdao University, Qingdao, 266000, China
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Chu J, Wang J, Cui L, Liu S, An N, Han J, Che X, Wu C, Yang J. Pseudoginsenoside-F11 ameliorates okadiac acid-induced learning and memory impairment in rats via modulating protein phosphatase 2A. Mech Ageing Dev 2021; 197:111496. [PMID: 33957218 DOI: 10.1016/j.mad.2021.111496] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2020] [Revised: 03/15/2021] [Accepted: 04/29/2021] [Indexed: 10/21/2022]
Abstract
We have reported that pseudoginsenoside-F11 (PF11) can significantly improve the cognitive impairments in several Alzheimer's disease (AD) models, but the mechanism has not been fully elucidated. In the present study, the effects of PF11 on AD, in particular the underlying mechanisms related with protein phosphatase 2A (PP2A), were investigated in a rat model induced by okadaic acid (OA), a selective inhibitor of PP2A. The results showed that PF11 treatment dose-dependently improved the learning and memory impairments in OA-induced AD rats. PF11 could significantly inhibit OA-induced tau hyperphosphorylation, suppress the activation of glial cells, alleviate neuroinflammation, thus rescue the neuronal and synaptic damage. Further investigation revealed that PF11 could regulate the protein expression of methyl modifying enzymes (leucine carboxyl methyltransferase-1 and protein phosphatase methylesterase-1) in the brain, thus increase methyl-PP2A protein expression and indirectly increase the activity of PP2A. Molecular docking analysis, structural alignment and in vitro results showed that PF11 was similar in the shape and electrostatic field feature to a known activator of PP2A, and could directly bind and activate PP2A. In conclusion, the present data indicate that PF11 can ameliorate OA-induced learning and memory impairment in rats via modulating PP2A.
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Affiliation(s)
- Jinxiu Chu
- Department of Pharmacology, Shenyang Pharmaceutical University, Shenyang 110016, PR China; Hebei Key Laboratory for Chronic Diseases, Tangshan Key Laboratory for Clinical and Basic Research on Chronic Diseases, College of Elementary Medicine, North China University of Science and Technology, Tangshan 063210, PR China
| | - Jian Wang
- Key Laboratory of Structure-Based Drug Design & Discovery, Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, PR China
| | - Lijuan Cui
- Department of Pharmacology, Shenyang Pharmaceutical University, Shenyang 110016, PR China
| | - Shuai Liu
- Department of Pharmacology, Shenyang Pharmaceutical University, Shenyang 110016, PR China
| | - Nina An
- Department of Pharmacology, Shenyang Pharmaceutical University, Shenyang 110016, PR China
| | - Jian Han
- Department of Pharmacology, Shenyang Pharmaceutical University, Shenyang 110016, PR China
| | - Xiaohang Che
- Department of Pharmacology, Shenyang Pharmaceutical University, Shenyang 110016, PR China
| | - Chunfu Wu
- Department of Pharmacology, Shenyang Pharmaceutical University, Shenyang 110016, PR China.
| | - Jingyu Yang
- Department of Pharmacology, Shenyang Pharmaceutical University, Shenyang 110016, PR China.
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Jia W, An N, Zhu H, Yu J. Osimertinib Greatly Increase the Risk of Radiotherapy Pneumonitis when Concurrent with Thoracic Radiotherapy. Int J Radiat Oncol Biol Phys 2020. [DOI: 10.1016/j.ijrobp.2020.07.1308] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Mao J, Niu C, Li K, Mobeen Tahir M, Khan A, Wang H, Li S, Liang Y, Li G, Yang Z, Zuo L, Han M, Ren X, An N, Zhang D. Exogenous 6-benzyladenine application affects root morphology by altering hormone status and gene expression of developing lateral roots in Malus hupehensis. Plant Biol (Stuttg) 2020; 22:1150-1159. [PMID: 32597557 DOI: 10.1111/plb.13154] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2020] [Accepted: 06/17/2020] [Indexed: 06/11/2023]
Abstract
Malus hupehensis is an extensively used apple rootstock in China. In the current study, M. hupehensis seedlings were treated with exogenous 2.2 µm 6-benzyladenine (6-BA) so as to investigate the mechanism by which 6-BA affects lateral root development. The results indicate that 6-BA treatment promotes elongation and thickening of both root and shoot in M. hupehensis, but reduces the number of lateral roots, as well as reducing the auxin level after 6-BA treatment. Moreover, MhAHK4, MhRR1 and MhRR2 were also significantly up-regulated in response to 6-BA treatment. Expression levels of auxin synthesis- and transport-related genes, such as MhYUCCA6, MhYUCCA10, MhPIN1 and MhPIN2, were down-regulated, which corresponds with lower auxin levels in the 6-BA-treated seedlings. A negative regulator of auxin, MhIAA3, was induced by 6-BA treatment, leading to reduced expression of MhARF7 and MhARF19 in 6-BA-treated seedlings. As a result, expression of MhWOX11, MhWOX5, MhLBD16 and MhLBD29 was blocked, which in turn inhibited lateral root initiation. In addition, a lower auxin level decreased expression of MhRR7 and MhRR15, which repressed expression of key transcription factors associated with root development, thus inhibiting lateral root development. In contrast, 6-BA treatment promoted secondary growth (thickening) of the root by inducing expression of MhCYCD3;1 and MhCYCD3;2. Collectively, the changes in hormone levels and gene expression resulted in a reduced number of lateral roots and thicker roots in 6-BA-treated plants.
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Affiliation(s)
- J Mao
- College of Horticulture, Northwest Agriculture & Forestry University, Yangling, China
- College of Life Science, Northwest Agriculture & Forestry University, Yangling, China
| | - C Niu
- College of Horticulture, Northwest Agriculture & Forestry University, Yangling, China
| | - K Li
- College of Horticulture, Northwest Agriculture & Forestry University, Yangling, China
| | - M Mobeen Tahir
- College of Horticulture, Northwest Agriculture & Forestry University, Yangling, China
| | - A Khan
- Department of Agricultural Sciences, the University of Haripur, Haripur, Pakistan
| | - H Wang
- College of Horticulture, Northwest Agriculture & Forestry University, Yangling, China
| | - S Li
- College of Horticulture, Northwest Agriculture & Forestry University, Yangling, China
| | - Y Liang
- Beijing Ori-Gene Science and Technology Corp., Ltd., Beijing, China
| | - G Li
- College of Horticulture, Northwest Agriculture & Forestry University, Yangling, China
| | - Z Yang
- College of Horticulture, Northwest Agriculture & Forestry University, Yangling, China
| | - L Zuo
- College of Horticulture, Northwest Agriculture & Forestry University, Yangling, China
| | - M Han
- College of Horticulture, Northwest Agriculture & Forestry University, Yangling, China
| | - X Ren
- College of Horticulture, Northwest Agriculture & Forestry University, Yangling, China
| | - N An
- College of Horticulture, Northwest Agriculture & Forestry University, Yangling, China
- College of Life Science, Northwest Agriculture & Forestry University, Yangling, China
| | - D Zhang
- College of Horticulture, Northwest Agriculture & Forestry University, Yangling, China
- College of Life Science, Northwest Agriculture & Forestry University, Yangling, China
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Wen H, Feng Z, Zhu C, An N, Wu X. Landscape of germline and somatic alterations of HRR and MMR genes in 328 Chinese patients with primary epithelial ovarian cancer(EOC). Gynecol Oncol 2020. [DOI: 10.1016/j.ygyno.2020.05.161] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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11
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An N, Yue L, Zhao B. [Droplets and aerosols in dental clinics and prevention and control measures of infection]. Zhonghua Kou Qiang Yi Xue Za Zhi 2020; 55:223-228. [PMID: 32093438 DOI: 10.3760/cma.j.cn112144-20200221-00081] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Spraying during dental practices can generate a large number of droplets, which may transform into droplet nuclei and suspend in the air of clinic in the form of aerosol. Either droplets or aerosols may carry microorganisms and cause air contamination in the hospital, posing potential threat to the health of clinical healthcare staff and patients. The present article summarizes some basic concepts involved in bio-aerosol research and reviews literatures on intervention measures of dental clinic droplet/aerosols to clarify whether there is experimental evidence of aerosol-carrying bacteria in the existing literatures. The aim of the present review article is to provide evidence for the formulation of guidelines for infection control in dental healthcare practices during the pandemic period of infectious diseases, as well as to provide reference and scientific basis for the management and implementation of infection control measures in daily dental clinical work.
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Affiliation(s)
- N An
- Department of General Dentistry Ⅱ, Peking University School and Hospital of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing 100081, China
| | - L Yue
- Department of Endodontics, Peking University School and Hospital of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing 100081, China
| | - B Zhao
- Department of Building Science, School of Architecture, Tsinghua University, Beijing 100084, China
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12
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Feng W, Hu Y, An N, Feng Z, Liu J, Mou J, Hu T, Guan H, Zhang D, Mao Y. Alginate Oligosaccharide Alleviates Monocrotaline-Induced Pulmonary Hypertension via Anti-Oxidant and Anti-Inflammation Pathways in Rats. Int Heart J 2020; 61:160-168. [PMID: 31956132 DOI: 10.1536/ihj.19-096] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Pulmonary arterial hypertension (PAH) is a serious and fatal cardiovascular disorder characterized by increased pulmonary vascular resistance and progressive pulmonary vascular remodeling. The underlying pathological mechanisms of PAH are multi-factorial and multi-cellular. Alginate oligosaccharide (AOS), which is produced by depolymerizing alginate, shows better pharmacological activities and beneficial effects. The present study was undertaken to investigate the effects and potential mechanisms of AOS-mediated alleviation of pulmonary hypertension. Pulmonary hypertension was induced in Sprague-Dawley rats by a single intraperitoneal injection of monocrotaline (MCT; 60 mg/kg). Five weeks after the injection of MCT, AOS (5, 10, and 20 mg·kg-1·d-1) was injected intraperitoneally for another three weeks. The results showed that AOS prevented the development of MCT-induced pulmonary hypertension and right ventricular hypertrophy in a dose-dependent manner. AOS treatment also prevented MCT-induced pulmonary vascular remodeling via inhibition of the TGF-β1/p-Smad2 signaling pathway. Furthermore, AOS treatment downregulated the expression of malondialdehyde, nicotinamide adenine dinucleotide phosphate oxidase, and pro-inflammatory cytokines, decreased macrophage infiltration, and upregulated the expression of anti-inflammatory cytokines. These findings indicate that AOS exerts anti-oxidative and anti-inflammatory effects in pulmonary arteries, which may contribute to the alleviation of pulmonary hypertension and pulmonary vascular remodeling.
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Affiliation(s)
- Wenjing Feng
- Department of Geriatrics, The Affiliated Hospital of Qingdao University.,Department of Epidemiology and Health Statistics, The School of Public Health of Qingdao University.,College of Medicine, University of Illinois at Chicago
| | - Yi Hu
- Department of Geriatrics, The Affiliated Hospital of Qingdao University
| | - Nina An
- Department of Geriatrics, The Affiliated Hospital of Qingdao University
| | - Zhe Feng
- Department of Geriatrics, The Affiliated Hospital of Qingdao University
| | - Jianya Liu
- Department of Geriatrics, The Affiliated Hospital of Qingdao University
| | - Jie Mou
- Department of Geriatrics, The Affiliated Hospital of Qingdao University
| | - Ting Hu
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, Shandong Provincial Key Laboratory of Glycoscience and Glycotechnology, School of Medicine and Pharmacy, Ocean University of China.,Laboratory for Marine Drugs and Bioproducts, Innovation Center for Marine Drugs Screening and Evaluation, Qingdao National Laboratory for Marine Science and Technology
| | - Huashi Guan
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, Shandong Provincial Key Laboratory of Glycoscience and Glycotechnology, School of Medicine and Pharmacy, Ocean University of China.,Laboratory for Marine Drugs and Bioproducts, Innovation Center for Marine Drugs Screening and Evaluation, Qingdao National Laboratory for Marine Science and Technology
| | - Dongfeng Zhang
- Department of Epidemiology and Health Statistics, The School of Public Health of Qingdao University
| | - Yongjun Mao
- Department of Geriatrics, The Affiliated Hospital of Qingdao University
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Yang YP, Yang S, An H, Liu XP, An N, Guo QW, Ao YF. [Surgical technique and mid-and-long curative effect analysis of primary repair of chronic Achilles tendon rupture]. Zhonghua Wai Ke Za Zhi 2019; 57:57-62. [PMID: 31510734 DOI: 10.3760/cma.j.issn.0529-5815.2019.10.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To examine the surgical method and clinical outcome of primary repair of chronic Achilles tendon rupture. Methods: From March 2012 to August 2017, clinical data of 35 consecutive patients with chronic Achilles tendon rupture who were treated with primary repair by the same doctor at Department of Sports Medicine, Peking University Third Hospital were retrospectively analyzed.There were 29 males and 6 females with age of (41.0±9.3)years(range:29-65 years), the follow-up period was (45.6±17.2) months(range:17-82 months). All the patients had unilateral tendon rupture with 22 cases on the left and 13 cases on the right.The preoperative and postoperative Visual Analogue Scale(VAS), American Orthopaedic Foot and Ankle Society Ankle-Hindfoot Score(AOFAS), the Victorian Institute of Sport Assessment-Achilles(VISA-A), the Achilles tendon Total Rupture Score(ATRS)and the Tegner Activity Score of patients were collected and compared by paired-t test. Results: Among 47 patients with chronic Achilles tendon rupture, 35 patients were followed up for (45.6 ± 17.2)months(range: 17-28 months). No serious postoperative complications such as infection or nerve damage and rerupture outcomes were reported. At the last follow-up,the VAS decreased from 1.0(2.0) (M(Q(R))) preoperative to 0.0(0.8)(Z=-3.586, P=0.00), AOFAS increased from 64.3±12.5 to 97.0±5.0(t=-14.359,P<0.001), VISA-A increased from 51.3± 9.8 to 87.8±18.0(t=- 17.656, P=0.00), Tegner increased from 0.9±0.3 to 4.6±1.7(t=- 12.524, P=0.00)and ATRS increased from 40.0±3.5 to 97.9±3.9(t=-64.133,P=0.00). Twenty-eight patients (80.0%) had returned to their preinjury activity levels, and 7 patients (20.0%) no longer participate in recreational sports. According to Arner-Lindholm curative effect evaluation criteria, 32 cases(91.4%)gained the excellent results, 1 case(2.9%) of good and 2 cases(5.7%) bad, and the percentage of the cases with the excellent or good results was 94.3%. All except 2 patients with bad results could perform a single-limb heel rise painlessly. Conclusions: Primary repair is an efficient approach for chronic Achilles tendon rupture. The mid-and-long curative effect is satisfactory and stable.Compared with other surgical techniques, operation is relatively simple and economical. The primary repair is considerably safe, with few serious complications such as infection or nerve damage and reruptures.
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Affiliation(s)
- Y P Yang
- Department of Sports Medicine, Peking University Third Hospital, Beijing 100191, China
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An N, Wang H, Jing W, Zhu H, Yu J. Local Consolidative Radiation Prolongs Disease Control of Patients with Oligometastatic NSCLC Harboring EGFR Activating Mutation Treated with First-Line EGFR-TKIs. Int J Radiat Oncol Biol Phys 2019. [DOI: 10.1016/j.ijrobp.2019.06.1402] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Sun S, Yang S, An N, Wang G, Xu Q, Liu J, Mao Y. Astragalus polysaccharides inhibits cardiomyocyte apoptosis during diabetic cardiomyopathy via the endoplasmic reticulum stress pathway. J Ethnopharmacol 2019; 238:111857. [PMID: 30959142 DOI: 10.1016/j.jep.2019.111857] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2019] [Revised: 03/27/2019] [Accepted: 04/01/2019] [Indexed: 06/09/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Traditional Chinese medicine Astragalus membranaceus (Fisch.) Bunge (AM) has been utilized for the treatment of diabetes mellitus and its complications for centuries. Astragalus polysaccharides (APS), the main bioactive ingredient extracted from the root of AM, is prescribed widely in China and has definite cardioprotective effect during diabetic cardiomyopathy (DCM). Endoplasmic reticulum (ER) stress-induced apoptosis played a crucial role in the progression of DCM. However, the regulatory mechanisms of APS on ER stress pathway haven't been comprehensively studied so far. AIM OF THE STUDY The aim of this study was to identify the effect of APS on cardiomyocyte apoptosis and to investigate the mechanisms for the anti-apoptotic effect of APS during DCM. MATERIALS AND METHODS DCM rat model was induced by intraperitoneal streptozotocin (STZ) injection and treated with APS for 16 weeks. Cardiac function, pathological changes and apoptotic cells were assessed by echocardiography, hematoxylin-eosin (HE) staining and TUNEL assay, respectively. Expressions of key molecules in ER stress pathway were detected by Western blot analysis. Cardiomyocytes were exposed to high glucose (HG) and treated with APS for 24 h. Cell viability, apoptosis and protein expressions were assessed by MTT, flow cytometer and Western blot analysis, respectively. Moreover, lentivirus over-expressing (OE) C/EBP homologous protein (CHOP) was employed to further investigate the causative role of ER stress pathway in APS-mediated effect on cardiomyocyte apoptosis. RESULTS In vivo, the results demonstrated that APS could improve heart function and attenuate myocardial apoptosis in DCM rat model. Further study demonstrated that APS could down-regulate the protein expressions of activating transcription factor 6 (ATF6) and protein kinase RNA-like ER kinase (PERK) related factors of ER stress pathway. In vitro, APS significantly inhibit HG stimulated H9C2 cell apoptosis and the expressions of ATF6 and PERK related proteins of ER stress pathway. However, after CHOP-OE lentivirus transfection, the protective effects of APS were diminished as increased apoptotic rate and higher expression of CHOP. CONCLUSIONS APS could attenuate cardiomyocyte apoptosis via down-regulating the expression of ATF6 and PERK related factors of ER stress pathway in DCM rats and HG-stimulated H9C2 cells.
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Affiliation(s)
- Shuqin Sun
- Department of Geriatrics, The Affiliated Hospital of Qingdao University, Qingdao, 266003, China.
| | - Shuo Yang
- Department of the Intensive Care Unit, The Affiliated Hospital of Qingdao University, Qingdao, 266003, China.
| | - Nina An
- Department of Geriatrics, The Affiliated Hospital of Qingdao University, Qingdao, 266003, China.
| | - Guimei Wang
- Department of Geriatrics, The Affiliated Hospital of Qingdao University, Qingdao, 266003, China.
| | - Qiang Xu
- Department of Geriatrics, The Affiliated Hospital of Qingdao University, Qingdao, 266003, China.
| | - Jia Liu
- Department of Geriatrics, The Affiliated Hospital of Qingdao University, Qingdao, 266003, China.
| | - Yongjun Mao
- Department of Geriatrics, The Affiliated Hospital of Qingdao University, Qingdao, 266003, China.
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Che X, Liu P, Wu C, Song W, An N, Yu L, Bai Y, Xing Z, Cai J, Wang X, Yang J. Potential role of the ecto-5'-nucleotidase in morphine-induced uridine release and neurobehavioral changes. Neuropharmacology 2018; 141:1-10. [PMID: 30071207 DOI: 10.1016/j.neuropharm.2018.07.035] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2018] [Revised: 07/24/2018] [Accepted: 07/29/2018] [Indexed: 12/21/2022]
Abstract
There is growing evidence that uridine may act as an endogenous neuromodulator with a potential signaling role in the central nervous system in addition to its function in pyrimidine metabolism. We previously found that acute morphine treatment significantly increased uridine release in the dorsal striatum of mice, indicating that uridine may contribute to morphine-induced neurobehavioral changes. In the present study, we analyzed the mechanism involved in morphine-induced uridine release and the role of uridine in morphine-induced neurobehavioral changes. Uridine release in the dorsal striatum of mice was assessed by in vivo microdialysis coupled with high performance liquid chromatography (HPLC) after morphine treatment. Western blotting and immunofluorescence were used to evaluate the expression of uridine-related proteins. Morphine-induced neurobehavioral changes were assessed by locomotor activity, behavioral sensitization and conditioned place preference (CPP) test. The expression of NT5E, an extracellular enzyme involved in formation of nucleosides, including uridine, was specifically knocked down in the dorsal striatum of mice using adeno-associated virus (AAV)-mediated short hairpin RNA (shRNA). The results indicated that both acute and chronic morphine administration significantly increased uridine release in the dorsal striatum, and this was associated with upregulation of NT5E but not other uridine-related proteins. Inhibition of NT5E with APCP or shRNA markedly inhibited morphine-induced uridine release in the dorsal striatum and related neurobehavioral changes, including hyperlocomotor activity, behavioral sensitization and CPP. Our data give a better understanding of the contribution of NT5E to morphine-induced uridine release and neurobehavioral changes, and identify NT5E as a potential target for treating morphine abuse.
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Affiliation(s)
- Xiaohang Che
- Department of Pharmacology, Shenyang Pharmaceutical University, 110016, Shenyang, PR China
| | - Ping Liu
- Department of Pharmacology, Shenyang Pharmaceutical University, 110016, Shenyang, PR China
| | - Chunfu Wu
- Department of Pharmacology, Shenyang Pharmaceutical University, 110016, Shenyang, PR China
| | - Wu Song
- Department of Pharmacology, Shenyang Pharmaceutical University, 110016, Shenyang, PR China
| | - Nina An
- Department of Pharmacology, Shenyang Pharmaceutical University, 110016, Shenyang, PR China
| | - Lisha Yu
- Department of Pharmacology, Shenyang Pharmaceutical University, 110016, Shenyang, PR China
| | - Yijun Bai
- Department of Pharmacology, Shenyang Pharmaceutical University, 110016, Shenyang, PR China
| | - Zheng Xing
- Department of Pharmacology, Shenyang Pharmaceutical University, 110016, Shenyang, PR China
| | - Jialing Cai
- Department of Pharmacology, Shenyang Pharmaceutical University, 110016, Shenyang, PR China
| | - Xiaomin Wang
- Department of Pharmacology, Shenyang Pharmaceutical University, 110016, Shenyang, PR China
| | - Jingyu Yang
- Department of Pharmacology, Shenyang Pharmaceutical University, 110016, Shenyang, PR China.
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Wang H, Du X, Chen WH, Lou J, Xiao HL, Pan YM, Chen H, An N, Zhang QX. Establishment of a Quantitative Polymerase Chain Reaction Assay for Monitoring Chimeric Antigen Receptor T Cells in Peripheral Blood. Transplant Proc 2018; 50:104-109. [PMID: 29407291 DOI: 10.1016/j.transproceed.2017.11.028] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2017] [Revised: 09/24/2017] [Accepted: 11/03/2017] [Indexed: 12/30/2022]
Abstract
BACKGROUND The chimeric antigen receptor (CAR) consists of an antigen recognition moiety from a monoclonal antibody fused to an intracellular signalling domain capable of activating T cells. The specific structure of the CAR molecule has been used in various basic research and clinical settings to detect CAR expression, but it is necessary to develop more specific and simpler monitoring methods to observe real-time changes. MATERIALS AND METHODS To develop a quantitative assay for the universal detection of DNA from anti-CD19 CAR-T cells, a TaqMan real-time quantitative polymerase chain reaction (qPCR) assay was developed using primers based on FMC63-28Z gene sequences. We identified the numbers of copies of CAR gene on T cells transduced with the CAR gene that were obtained from peripheral blood. RESULTS The assay had a minimum detection limit of 10 copies/μL and a strong linear standard curve (y = -3.3682x + 38.594; R2 = 0.999) within the range of the input CAR gene (10-107 copies/μL). The reproducibility test showed a coefficient of variation ranging from 0.63%-1.65%. Real-time qPCR is a highly sensitive, specific, reproducible, and universal method that can be used to detect anti-CD19 CAR-T cells in peripheral blood.
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Affiliation(s)
- H Wang
- Shenzhen Bone Marrow Transplantation Public Service Platform, Shenzhen Institute of Hematology, Shenzhen Second People's Hospital, The First Affiliated Hospital of Shenzhen University, Shenzhen, China; Guangzhou Medical University, Guangzhou, China
| | - X Du
- Shenzhen Bone Marrow Transplantation Public Service Platform, Shenzhen Institute of Hematology, Shenzhen Second People's Hospital, The First Affiliated Hospital of Shenzhen University, Shenzhen, China
| | - W-H Chen
- Shenzhen Bone Marrow Transplantation Public Service Platform, Shenzhen Institute of Hematology, Shenzhen Second People's Hospital, The First Affiliated Hospital of Shenzhen University, Shenzhen, China
| | - J Lou
- Shenzhen Bone Marrow Transplantation Public Service Platform, Shenzhen Institute of Hematology, Shenzhen Second People's Hospital, The First Affiliated Hospital of Shenzhen University, Shenzhen, China
| | - H-L Xiao
- Shenzhen Bone Marrow Transplantation Public Service Platform, Shenzhen Institute of Hematology, Shenzhen Second People's Hospital, The First Affiliated Hospital of Shenzhen University, Shenzhen, China; Guangzhou Medical University, Guangzhou, China
| | - Y-M Pan
- Shenzhen Bone Marrow Transplantation Public Service Platform, Shenzhen Institute of Hematology, Shenzhen Second People's Hospital, The First Affiliated Hospital of Shenzhen University, Shenzhen, China
| | - H Chen
- Shenzhen Bone Marrow Transplantation Public Service Platform, Shenzhen Institute of Hematology, Shenzhen Second People's Hospital, The First Affiliated Hospital of Shenzhen University, Shenzhen, China
| | - N An
- Shenzhen Bone Marrow Transplantation Public Service Platform, Shenzhen Institute of Hematology, Shenzhen Second People's Hospital, The First Affiliated Hospital of Shenzhen University, Shenzhen, China
| | - Q-X Zhang
- Shenzhen Bone Marrow Transplantation Public Service Platform, Shenzhen Institute of Hematology, Shenzhen Second People's Hospital, The First Affiliated Hospital of Shenzhen University, Shenzhen, China.
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Zhao C, Wu AYH, Yu X, Gu Y, Lu Y, Song X, An N, Zhang Y. Microdomain elements of airway smooth muscle in calcium regulation and cell proliferation. J Physiol Pharmacol 2018; 69. [PMID: 29920471 DOI: 10.26402/jpp.2018.2.01] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Received: 09/14/2017] [Accepted: 04/24/2018] [Indexed: 11/03/2022]
Abstract
Airway remodeling manifested by hyperplasia of airway smooth muscle cells (ASMCs) and other structural and functional changes is a pathological condition in asthma not addressed by current treatment. Ca2+ signaling is crucial for ASMC proliferation. Inositol-1,4,5-trisphosphate receptor (IP3R) and ryanodine receptor (RyR) mediate Ca2+ release from endoplasmic reticulum/sarcoplasmic reticulum (ER/SR). Upon sensing the depletion of Ca2+ in ER/SR, stromal interaction molecule 1 (STIM1) aggregates and redistributes at the microdomain of ER/SR-plasma membrane (PM) and activates Orai1, a component of the store-operated Ca2+ (SOC) channels, to initiate Ca2+ influx. The STIM1/Orai1-mediated SOC entry is the main cause of a sustained intracellular calcium ([Ca2+]i) elevation, which is different from a transient rise of [Ca2+]i mediated by IP3R and RyR. Extended-synaptotagmin 1 (E-Syt1) is recruited to the ER/SR-PM junction and anchors to the PM lipid phosphatidylinositol-4,5-bisphosphate (PI(4,5)P2) in a SOC-dependent manner. The subsequent strengthening of the ER/SR-PM connection by E-Syt1 facilitates the phosphatidylinositol (PI) transfer protein, Nir2, to supplement PI, a PI(4,5)P2 substrate, for the generation of IP3 and the propagation of Ca2+ signaling. Calcineurin and nuclear factor of activated T cells are the downstream signaling factors of elevated [Ca2+]i contributing to ASMC proliferation. Mitochondrial Ca2+ uptake/efflux, mitochondrial fission/fusion and mitochondrial-ER/SR coupling also play important roles in modulating [Ca2+]i and ASMC proliferation. Together, these pathways and mechanisms represent new therapeutic targets for airway remodeling. The present review provides an overview of our current understanding of the mechanisms of ASMC proliferation involving Ca2+ and highlights potential directions to control airway remodeling in asthma.
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Affiliation(s)
- C Zhao
- School of Life Science and Biopharmaceutics, Shenyang Pharmaceutical University, Shenyang, China
| | - A Y-H Wu
- School of Life Science and Biopharmaceutics, Shenyang Pharmaceutical University, Shenyang, China
| | - X Yu
- School of Life Science and Biopharmaceutics, Shenyang Pharmaceutical University, Shenyang, China
| | - Y Gu
- School of Life Science and Biopharmaceutics, Shenyang Pharmaceutical University, Shenyang, China
| | - Y Lu
- School of Life Science and Biopharmaceutics, Shenyang Pharmaceutical University, Shenyang, China
| | - X Song
- School of Life Science and Biopharmaceutics, Shenyang Pharmaceutical University, Shenyang, China
| | - N An
- School of Life Science and Biopharmaceutics, Shenyang Pharmaceutical University, Shenyang, China
| | - Y Zhang
- School of Life Science and Biopharmaceutics, Shenyang Pharmaceutical University, Shenyang, China. ;
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An N, Li Y, Tang ZL, Chen XY, Wang DX, Gao Q. [Expression of osteoprotegerin and receptor activator of nuclear factor kappa-B ligand in mandibular ramus osteotomy healing with administration of different doses of parathyroid hormone]. Zhonghua Kou Qiang Yi Xue Za Zhi 2018; 53:413-418. [PMID: 29886637 DOI: 10.3760/cma.j.issn.1002-0098.2018.06.010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To investigate the effect of parathyroid hormone (PTH) on the bone healing of mandibular ramus osteotomy. Methods: The mandibular ramus osteotomy model was established in sixty rabbits and these rabbits were randomly divided into experimental group A, experimental group B and control group. In the experimental group A and experimental group B, the rabbits were given PTH (20 and 40 μg/kg respectively) every other day after operation. In the control group, 1 ml saline was given. The animals were sacrificed at 1 week, 2 weeks, 3 weeks and 4 weeks postoperatively. The new bone formation was observed by histology and cone bone CT. The expression of osteoprotegerin and receptor activator of nuclear factor kappa-B (RANKL) in the new bone was detected by real-time quantitative PCR. Results: The experimental groups has better osteogenesis and the bone mineral density than the control group in osteotomy area. The experimental group B showed the best osteogenesis.Osteoprotegerin mRNA expression in experimental group A (1.127±0.035, 1.742±0.049, 1.049±0.062, 1.063±0.036) was significantly higher than that in the control group in each period (0.965±0.082, 1.254±0.071, 0.793±0.061, 0.684±0.055) (P=0.010, P=0.000, P=0.001, P=0.020), while group B (1.416±0.205, 2.648±0.168, 1.652±0.091, 1.712±0.070) was significantly higher than group A (P=0.000, P=0.010, P=0.023, P=0.003). RANKL mRNA expression in control group (1.666±0.086, 1.058±0.105, 0.885±0.124, 0.972±0.136) was significantly higher than that of the group A (0.788±0.036, 0.585±0.017, 0.692±0.017, 0.527±0.051) (P=0.001, P=0.006, P=0.003, P=0.028) in each period, while group A was significantly higher than group B(0.247±0.022, 0.240±0.034, 0.134±0.011, 0.103±0.050) (P=0.000, P=0.001, P=0.002, P=0.012). Conclusions: PTH can upregulate the expression of osteoprotegerin and reduce expression of RANKL, thus promoting new bone formation. Intermittent administration of high dose of parathyroid hormone can further promote the healing process after mandibular ramus osteotomy.
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Affiliation(s)
- N An
- Department of Oral and Maxillofacial Surgery, Stomatological Hospital of Guizhou Medical University, Guiyang 550004, China (Present address: Department of Stomatology, The Fifth Hospital in Wuhan, Wuhan 430050, China)
| | - Y Li
- Department of Oral and Maxillofacial Surgery, Stomatological Hospital of Guizhou Medical University, Guiyang 550004, China
| | - Z L Tang
- Department of Oral and Maxillofacial Surgery, Stomatological Hospital of Guizhou Medical University, Guiyang 550004, China
| | - X Y Chen
- Department of Oral and Maxillofacial Surgery, Stomatological Hospital of Guizhou Medical University, Guiyang 550004, China
| | - D X Wang
- Department of Oral and Maxillofacial Surgery, Stomatological Hospital of Guizhou Medical University, Guiyang 550004, China
| | - Q Gao
- Department of Oral and Maxillofacial Surgery, Stomatological Hospital of Guizhou Medical University, Guiyang 550004, China
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Liao YT, Liu Y, Jiang Y, Ouyang XY, He L, An N. [A clinical evaluation of periodontal treatment effect using periodontal endoscope for patients with periodontitis: a split-mouth controlled study]. Zhonghua Kou Qiang Yi Xue Za Zhi 2018; 51:722-727. [PMID: 27978912 DOI: 10.3760/cma.j.issn.1002-0098.2016.12.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To compare the clinical effects of periodontal treatment using periodontal endoscope with that of conventional treatment method for patients with periodontitis. Methods: Eleven periodontal patients with moderate to advanced periodontal destruction were recruited and treated with scaling and root planing in a split-mouth design randomly with (test group) or without (control group) periodontal endoscope. Changes of such clinical parameters as plaque index (PLI), bleeding index (BI), probing depth (PD) and attachment loss (AL) before and after treatments as well as the difference between test and control groups were examined and compared. Results: Both groups showed significant reductions in PD, BI and AL values at 6 weeks and 3 months after treatment (P <0.001). Only in the test group, for sites with PD≥6 mm at baseline, PD value ([4.0±1.2] mm) and AL value ([3.8±0.9] mm) at the end of 3 months were significantly lower than that at the end of 6 weeks (PD[4.4±1.3] mm, P<0.001; AL[4.1±1.1] mm, P< 0.05). There were no significant differences between two groups at the baseline, at the end of 6 weeks and 3 months, respectively. However, for the sites with PD≥6 mm in anterior teeth, PD value in test group at the end of 3 months was significantly lower than that in control group ([3.2±0.9] mm vs [3.7±0.9] mm, P <0.05), while AL value tend to be lower ([2.9 ± 1.2] mm vs [3.6 ± 1.3] mm, P=0.061). Conclusions: Periodontal treatment using endoscope is obviously effective, especially for the medium and long term prognosis of deep pockets and single rooted teeth.
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Affiliation(s)
- Y T Liao
- Department of General Dentistry II, Peking University School and Hospital of Stomatology & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing 100081, China
| | - Y Liu
- Department of General Dentistry II, Peking University School and Hospital of Stomatology & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing 100081, China
| | - Y Jiang
- Department of General Dentistry II, Peking University School and Hospital of Stomatology & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing 100081, China
| | - X Y Ouyang
- Department of Periodontology, Peking University School and Hospital of Stomatology & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing 100081, China
| | - L He
- Department of Periodontology, Peking University School and Hospital of Stomatology & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing 100081, China
| | - N An
- Department of General Dentistry II, Peking University School and Hospital of Stomatology & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing 100081, China
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Liu YJ, Ouyang XY, Wang YG, Lv PJ, An N. [Role of vitamin K-dependent protein Gas6 in the expression of endothelial cell adhesion molecule-1 and chemokines induced by Porphyromonas gingivalis lipopolysaccharide]. Beijing Da Xue Xue Bao Yi Xue Ban 2018; 50:20-25. [PMID: 29483717] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
OBJECTIVE Growth-arrest-specific protein 6 (Gas6) is a vitamin K-dependent protein and involved in cell proliferation, survival, adhesion and migration . Also it has been shown to play an important role in the inflammatory response .The aim of present study was to investigate the role of Gas6 in the process of the expression of adhesion molecules and chemokines of human umbilical vein endothelial cells (HUVECs) induced by Porphyromonas gingivalis lipopolysaccharide(P.g-LPS). METHODS After up-regulation and down-regulation of the expression of Gas6, the vascular endothelial cells were stimulated with 1 mg/L P.g-LPS for 3 h and 24 h. Real-time quantitative polymerase chain reaction(real-time PCR) was taken to detect the expression of the cell adhesion molecules:intercellular adhesion molecule-1 (ICAM-1) and E-selectin, as well as chemokines:interleukin-8 (IL-8) and monocyte chemoattractant protein 1 (MCP-1). Wound healing assay was taken to observe the migration ability of endothelium cells in different groups. RESULTS After 3 h of P.g-LPS stimulation, the expression of adhesion molecules and chemokine in the down-regulation group was not significantly different from that in the control group,while in the up-regulation group the decrease of E-selectin, ICAM-1, IL-8 and MCP-1 was 81%±0%, 47%±3%, 76% ± 3%, 26% ± 6% respectively. After 24 h of P.g-LPS stimulation, the expression of adhesion molecules and chemokine in down-regulation group was significantly higher than that in control group (2.06±0.07, 1.99±0.11, 3.14±0.15, 1.84±0.03 flod), while these molecules in the down-regulation group was significantly lower than in the control group (29%±1%, 62%±3%, 69%±1%, 41%±2%). Differences were statistically significant (P<0.01). Wounding healing assay showed that down-regulation of Gas6 enhanced migration ability of endothelial cells while up-regulation of Gas6 weakened this ability,which was consistent with the trend of real-time PCR result. CONCLUSION Down-regulation of the Gas6 gene enhanced the expression of ICAM-1, E-selectin, IL-8 and MCP-1 in HUVECs after P.g- LPS stimulating, while up-regulaiton of the Gas6 gene weakened the expression of ICAM-1, E-selectin, IL-8 and MCP-1 in HUVECs after P.g-LPS stimulating,suggesting that Gas6 may play a role in the process of endothelial cell adhesion.
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Affiliation(s)
- Y J Liu
- Department of General Dentistry II, Peking University School and Hospital of Stomatology & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing 100081, China
| | - X Y Ouyang
- Department of Periodontology, Peking University School and Hospital of Stomatology & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing 100081, China
| | - Y G Wang
- Department of Prosthodontics, Peking University School and Hospital of Stomatology & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing 100081, China
| | - P J Lv
- Department of Prosthodontics, Peking University School and Hospital of Stomatology & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing 100081, China
| | - N An
- Department of General Dentistry II, Peking University School and Hospital of Stomatology & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing 100081, China
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An N, Li X, Shen M, Chen SL, Huang ZX. [Clinical analysis of multiple myeloma-associated amyloidosis]. Zhonghua Yi Xue Za Zhi 2018; 98:365-369. [PMID: 29429248 DOI: 10.3760/cma.j.issn.0376-2491.2018.05.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To investigate the clinical features and survival of multiple myeloma-associated amyloidosis patients. Methods: Twenty three multiple myeloma-associated amyloidosis patients were retrospectively analyzed from January 2009 to December 2016. Results: The overall response rate(ORR)was 65.2% and the remission rate (sCR+ CR) was 21.7%. The median progression-free survival(PFS) was fourteen months(1-63), and the median overall survival(OS)was fifteen months(3-63). The early death rate (death rate within one year)was 33.3%. The median OS of patients(n=9)with the performance status(PS) score >2 was seven months(1-15), and the median OS of patients(n=14)with the PS score ≤2 was thirty months(10-63). There was a statistically significant difference in OS(P<0.05); the median PFS and OS of the patients (n=15) who responded to inductive treatment were seventeen months(2-63) and twenty four months (4-63)respectively, and the median PFS and OS of the patients (n=8)who did not respond to inductive treatment were three months(1-8) and eleven months (3-15) respectively. There was a statistically significant difference in PFS and OS(P<0.05). There was a statistically significant difference in PFS and OS between patients treated with remission (n=5)and those who did not(n=18) (P<0.05). Conclusions: The multiple myeloma-associated amyloidosis patients had a high early death rate and short survival time. Early identification and effective treatment are the preconditions for improving the poor prognosis.
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Affiliation(s)
- N An
- Department of Hematology and Oncology, Beijing Chaoyang Hospital, Capital Medical University, Beijing 100043, China
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An N, Xie YP, Xu Y, Shi PF, Qian SX. [The prognostic significance of plasma Epstein-Barr virus DNA in patients with diffuse large B cell lymphoma]. Zhonghua Nei Ke Za Zhi 2017; 56:839-841. [PMID: 29136714 DOI: 10.3760/cma.j.issn.0578-1426.2017.11.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
To retrospectively analyze the prognostic significance of plasma Epstein-Barr virus (EBV) DNA in 122 patients with diffuse large B cell lymphoma (DLBCL). Plasma EBV DNA positivity was related to advanced disease stage (P=0.030), B symptoms (P=0.004) and elevated serum lactic dehydrogenase (LDH) (P=0.001). Furthermore, univariate analysis indicated that plasma EBV DNA level was associated with worse overall survival (OS) (HR=0.223, 95%CI 0.096-0.518, P<0.001) and worse progression free survival (PFS) (HR=4.417, 95%CI 1.911-10.208, P<0.001), whereas multivariate analysis showed plasma EBV DNA as a probable independent prognostic factor of clinical outcome(HR=0.409, 95%CI 0.166-1.008, P=0.052).
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Affiliation(s)
- N An
- Department of Hematology, Affiliated Hangzhou Hospital of Nanjing Medical University, Hangzhou 310006, China
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Affiliation(s)
- N. An
- Hefei University of Technology, Hefei, Anhui, China,
- Environment and Health Group, Cambridge, Massachusetts,
| | - H. Chen
- Environment and Health Group, Cambridge, Massachusetts,
- Brigham and Women’s Hospital, Boston, Massachusetts
| | | | - S. Levkoff
- Environment and Health Group, Cambridge, Massachusetts,
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An N, Chen SL, Li X. [A case report of immunoglonulin λ light chain amyloidosis combined with leukocyte cell-derived chemotaxin-2 amyloidosis]. Zhonghua Nei Ke Za Zhi 2017; 56:298-300. [PMID: 28355725 DOI: 10.3760/cma.j.issn.0578-1426.2017.04.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Wang CC, Guo L, Tian FD, An N, Luo L, Hao RH, Wang B, Zhou ZH. Naringenin regulates production of matrix metalloproteinases in the knee-joint and primary cultured articular chondrocytes and alleviates pain in rat osteoarthritis model. ACTA ACUST UNITED AC 2017; 50:e5714. [PMID: 28355351 PMCID: PMC5423744 DOI: 10.1590/1414-431x20165714] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2016] [Accepted: 11/22/2016] [Indexed: 01/08/2023]
Abstract
Inflammation of cartilage is a primary symptom for knee-joint osteoarthritis. Matrix metalloproteinases (MMPs) are known to play an important role in the articular cartilage destruction related to osteoarthritis. Naringenin is a plant-derived flavonoid known for its anti-inflammatory properties. We studied the effect of naringenin on the transcriptional expression, secretion and enzymatic activity of MMP-3 in vivo in the murine monosodium iodoacetate (MIA) osteoarthritis model. The assessment of pain behavior was also performed in the MIA rats. The destruction of knee-joint tissues was analyzed microscopically. Moreover, the effect of naringenin was also studied in vitro in IL-1β activated articular chondrocytes. The transcriptional expression of MMP-3, MMP-1, MMP-13, thrombospondin motifs (ADAMTS-4) and ADAMTS-5 was also studied in primary cultured chondrocytes of rats. Naringenin caused significant reduction in pain behavior and showed marked improvement in the tissue morphology of MIA rats. Moreover, a significant inhibition of MMP-3 expression in MIA rats was observed upon treatment with naringenin. In the in vitro tests, naringenin caused a significant reduction in the transcriptional expression, secretion and enzymatic activity of the studied degradative enzymes. The NF-κB pathway was also found to be inhibited upon treatment with naringenin in vitro. Overall, the study suggests that naringenin alleviated pain and regulated the production of matrix-metalloproteinases via regulation of NF-κB pathway. Thus, naringenin could be a potent therapeutic option for the treatment of osteoarthritis.
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Affiliation(s)
- C C Wang
- Department II of Orthopedics, Affiliated Zhongshan Hospital of Dalian University, Dalian, Liaoning, China
| | - L Guo
- Department II of Orthopedics, Affiliated Zhongshan Hospital of Dalian University, Dalian, Liaoning, China
| | - F D Tian
- Department II of Orthopedics, Affiliated Zhongshan Hospital of Dalian University, Dalian, Liaoning, China
| | - N An
- Department II of Orthopedics, Affiliated Zhongshan Hospital of Dalian University, Dalian, Liaoning, China
| | - L Luo
- Department of Respiratory Medicine, Affiliated Zhongshan Hospital of Dalian University, Dalian, Liaoning, China
| | - R H Hao
- Department II of Orthopedics, Affiliated Zhongshan Hospital of Dalian University, Dalian, Liaoning, China
| | - B Wang
- Department II of Orthopedics, Affiliated Zhongshan Hospital of Dalian University, Dalian, Liaoning, China
| | - Z H Zhou
- Department II of Orthopedics, Affiliated Zhongshan Hospital of Dalian University, Dalian, Liaoning, China
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Gao JL, Zhu MY, An N, Fu H. [Workplace social capital and intention to stay among Chinese nurses: a structural equation model]. Zhonghua Lao Dong Wei Sheng Zhi Ye Bing Za Zhi 2017; 35:111-114. [PMID: 28355698 DOI: 10.3760/cma.j.issn.1001-9391.2017.02.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Objective: To explore a model that workplace social capital is associated with intention to stay (ITS) in the nursing profession and that this association is partially mediated by organizational commitment, job satisfaction, and job stress among Chinese nurses. Methods: A cross-sectional, observationalstudy was conducted in Shanghai, China between September and December 2014. Two thousandforty-two nurses from 23 healthcare organizations were recruited for the current study using a two-stage sampling process.Intention to stay, workplace social capital, job satisfaction, organizational commitment, and job stress was measured by validated scale. Measured variable path analysis (MVPA) was used to test their hypothesized relationships. Results: There were significant positive direct effects from workplace social capital (β=0.11, P<0.01) , organizational commitment (β=0.81, P<0.01) and job satisfaction (β=0.03, P<0.01) to ITS, and a negative direct effects from job strain to ITS (β=-0.03, P<0.01) . The model explained 84% of the variability in ITS. Additionally, workplace social capital had significant positive direct effects on organizational commitment (β=0.65, P<0.01) , job satisfaction (β=0.44, P<0.01) and negative direct effects on job strain (β=-0.35, P<0.01) . The indirect effect of social capital to ITS was 0.55. Job satisfaction was positively associated with organizational commitment (r=0.47, P<0.01) , and negtively associated with job stress (r=-0.12, P<0.01) . Job stress was negtively associated with organizational commitment (r=-0.20, P<0.01) . Conclusion: This study suggests that greater workplace social capital may lead to higher ITS in nursing primarily by increasing commitment to the nursing occupation and their job satisfaction and by reducing their sense of job stress.
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Affiliation(s)
- J L Gao
- School of Public Health, Fudan University, Shanghai 200032, China
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Tang SH, Wang HY, Sun H, An N, Xiao L, Sun Q, Zhao DB. Propofol inhibits carbachol-induced chloride secretion by directly targeting the basolateral K + channel in rat ileum epithelium. Neurogastroenterol Motil 2017; 29. [PMID: 27578144 DOI: 10.1111/nmo.12934] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/10/2016] [Accepted: 08/04/2016] [Indexed: 02/08/2023]
Abstract
BACKGROUND Propofol is a widely used intravenous general anesthetic. Acetylcholine (ACh) is critical in controlling epithelial ion transport. This study was to investigate the effects of propofol on ACh-evoked secretion in rat ileum epithelium. METHODS The Ussing chamber technique was used to investigate the effects of propofol on carbachol (CCh)-evoked short-circuit currents (Isc). KEY RESULTS Propofol (10-2 -10-6 mol/L) attenuated CCh-evoked Isc of rat ileum mucosa in a dose-dependent manner. The inhibitory effect of propofol was only evident after application to the serosal side. Pretreatment with tetrodotoxin (TTX, 0.3 μmol/L, n=5) had no effect on propofol-induced inhibitory effect, whereas serosal application of K+ channel inhibitor, glibenclamide, but not, an ATP-sensitive K+ channel inhibitor, largely reduced the inhibitory effect of propofol. In addition, pretreatment with either hexamethonium bromide (HB, nicotinic nACh receptor antagonist) or Cl- channel blockers niflumic acid and cystic fibrosis transmembrane conductance regulator (inh)-172 did not produce any effect on the propofol-induced inhibitory effect. CONCLUSIONS & INFERENCES Propofol inhibits CCh-induced intestinal secretion by directly targeting basolateral K+ channels.
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Affiliation(s)
- S-H Tang
- Department of Anesthesiology, Qilu Hospital, Shandong University, Jinan, China
| | - H-Y Wang
- Department of Physiology, School of Medicine, Shandong University, Jinan, China
| | - H Sun
- Department of Thoracic Surgery, Shandong Tumor Hospital, Shandong University, Jinan, China
| | - N An
- Department of Physiology, School of Medicine, Shandong University, Jinan, China
| | - L Xiao
- Department of Physiology, School of Medicine, Shandong University, Jinan, China
| | - Q Sun
- Department of Physiology, School of Medicine, Shandong University, Jinan, China
| | - D-B Zhao
- Department of Thoracic Surgery, Shandong Tumor Hospital, Shandong University, Jinan, China
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An N, Li X, Shen M, Chen SL, Huang ZX. [A clinical analysis of 69 newly diagnosed multiple myeloma patients with renal insufficiency]. Zhonghua Nei Ke Za Zhi 2016; 55:764-768. [PMID: 27686436 DOI: 10.3760/cma.j.issn.0578-1426.2016.10.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Objective: To investigate the efficacy and outcome in newly diagnosed multiple myeloma (MM) patients with renal insufficiency using bortezomib- or thalidomide-based regimens as front line treatment. Method: Sixty-nine newly diagnosed MM patients with renal insufficiency were retrospectively analyzed from August 2006 to August 2014. Results: ① Among thirty-nine patients with bortezomib based regimens (the bortezomib group), the overall response rate (ORR) was 89.7% and complete response (CR) plus near CR(nCR) rate was 41.0%. By contrast, among thirty patients with thalidomide based regimens (the thalidomide group), the ORR was 83.3% and CR+ nCR rate was 26.7%. There was no significant difference of either ORR or CR+ nCR rate between bortezomib and thalidomide groups. ② The improvement rate of renal function in bortezomib group and thalidomide group were 87.2% and 60.0% respectively (P=0.012). The median duration time of renal injury was 45 days in 52 patients with renal function improved, which was significantly shorter compared with 222 days in 17 patients without improvement (P<0.05). There was no difference of median serum creatinine and creatinine clearance rate between the two groups.③ The median progression-free survival (PFS) and the overall survival (OS) were 18 and 33.5 months, respectively in all patients. The three-year and five-year OS rates were 57% and 17%, respectively. The median PFS was 19 months in bortezomib group, while it was only 12 months in thalidomide group (P=0.023). The median OS were 36.5 months and 25.5 months respectively, which was no difference (P=0.285). Conclusions: The newly diagnosed MM patients with renal insufficiency could get higher ORR and the longer PFS using bortezomib-containing regimens as initial therapy. Meanwhile the improvement rate of renal function and the living quality in patients with bortezomib are better compared with those with thalidomide based treatment.
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Affiliation(s)
- N An
- Department of Hematology and Oncology, Beijing Chaoyang Hospital, Capital Medical University, Beijing 100043, China
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Tang S, Huang D, An N, Chen D, Zhao D. A novel pathway for the production of H2 S by DAO in rat jejunum. Neurogastroenterol Motil 2016; 28:687-92. [PMID: 26813142 DOI: 10.1111/nmo.12765] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/03/2015] [Accepted: 12/02/2015] [Indexed: 02/07/2023]
Abstract
BACKGROUND Hydrogen sulfide (H2 S) is endogenously generated from L-cysteine (L-Cys) by the enzymes cystathionine-β-synthase (CBS) and cystathionine-γ-Lyase (CSE). Hydrogen sulfide is also produced from D-cysteine (D-Cys) by D-Amino acid oxidase (DAO). METHODS The H2 S production was measured by the methylene blue assay. The expression of DAO was investigated by Western blotting and immunohistochemistry. The short-circuit current (Isc) was recorded using the Ussing chamber technique. KEY RESULTS The epithelium in rat jejunum possesses DAO, and generates H2 S. D-cysteine, originally used as a negative control for L-Cys, significantly increases the H2 S release, which is inhibited by I2CA, an inhibitor of DAO. In vitro study by Ussing chamber technique reveals that D-Cys decreases the Isc across the epithelium of the rat jejunum and enhances the Na(+) -coupled L-alanine transport. CONCLUSIONS & INFERENCES A novel pathway for the production of H2 S by DAO exists in rat jejunum.
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Affiliation(s)
- S Tang
- Department of Anesthesiology, Qilu Hospital, Shandong University, Jinan, China
| | - D Huang
- Department of Physiology, School of Medicine, Shandong University, Jinan, China
| | - N An
- Department of Physiology, School of Medicine, Shandong University, Jinan, China
| | - D Chen
- Department of Physiology, School of Medicine, Shandong University, Jinan, China
| | - D Zhao
- Department of Thoracic Surgery, Shandong Tumor Hospital, Jinan, China
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Abstract
Marek's disease (MD), a highly infectious lymphoproliferative disease in chickens, is caused by a cell-associated oncogenic herpesvirus, Marek's disease virus (MDV). MSB-1 is a MD-derived lymphoblastoid cell line and can induce tumors when inoculated into susceptible chickens. Betulinic acid, which is present as one of the major effective components in many traditional Chinese medicines, has recently been reported to inhibit growth of cancer cells and employed as a potential anticancer agent. Tripterine, a major active compound extracted from the Chinese herb Tripterygium wilfordii Hook F, has now also shown anti-tumor activities in various cancers. The aim of this study was to investigate the synergistic growth-inhibitive effect of betulinic acid combined with tripterine on MSB-1 cells and its mechanism. Viability of MSB-1 cells was assessed by 3-(4,5-dimethylthiazol-2-y1)-2,5-diphenyltetrazolium bromide (MTT) method. Cell apoptotic analysis was performed by fluorescence detection. NF-κB transcription activity was detected by measuring luciferase activity. Western blotting was used to analyze the expression of p65, IκB and Meq. Our results showed that the proliferation in the combination group was significantly decreased as compared with that of monotherapy using betulinic acid or tripterine, accompanied by an induction of apoptosis, inhibition of NF-κB transcriptional activity and its targeting oncogenic gene Meq. The results suggest that the combination of betulinic acid and tripterine at lower concentration may produce a synergistic inhibitive effect on MSB-1 cells that warrants further investigation for its potential clinical applications.
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An N, Li LL, Wang RX, Li LL, Yue JM, Liu RZ. Clinical and cytogenetic results of a series of amniocentesis cases from Northeast China: a report of 2500 cases. Genet Mol Res 2015; 14:15660-7. [PMID: 26634534 DOI: 10.4238/2015.december.1.18] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
The aims of this study were to demonstrate the clinical and cytogenetic results of amniocentesis (AS) cases in Northeast China, to compare the incidence of different kinds of chromosomal abnormalities, and to study the association between the detection rate of chromosomal abnormalities and different indications for prenatal diagnosis. Cytogenetic analysis was performed on long-term tissue cultures of 2500 second-trimester amniotic fluid samples. The most common indication for genetic AS was abnormal maternal serum-screening test (69.56%), followed by advanced maternal age (15.04%). Chromosomal abnormality was detected in 206 (8.24%) of the 2500 samples. The detection rate of abnormal karyotypes was 62.5% in the group in which one member of the couple was a carrier of a chromosome abnormality; in the group having a positive result from noninvasive prenatal testing, the frequency was 50%. To determine the origin of fetal chromosome abnormal karyotype, 45 fetuses were analyzed. Of these, 20 were found to be de novo abnormalities and 25 were familial. The frequency and proportion of abnormal karyotypes varied substantially across different maternal AS indications. Knowing the origin and type of chromosomal abnormality would help determine termination or continuation of the pregnancy.
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Affiliation(s)
- N An
- Center for Reproductive Medicine of the First Bethune Hospital of Jilin University, Changchun, Jilin, China
| | - L L Li
- Center for Reproductive Medicine of the First Bethune Hospital of Jilin University, Changchun, Jilin, China
| | - R X Wang
- Center for Reproductive Medicine of the First Bethune Hospital of Jilin University, Changchun, Jilin, China
| | - L L Li
- Center for Reproductive Medicine of the First Bethune Hospital of Jilin University, Changchun, Jilin, China
| | - J M Yue
- Center for Reproductive Medicine of the First Bethune Hospital of Jilin University, Changchun, Jilin, China
| | - R Z Liu
- Center for Reproductive Medicine of the First Bethune Hospital of Jilin University, Changchun, Jilin, China
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Abstract
This study aimed to improve understanding of the diagnosis, treatment, and prognosis of primary bone marrow (PBM) diffuse large B-cell lymphoma (DLBCL), a rare illness. We report a 56-year-old man with pancytopenia and hyperbilirubinemia but without lymphadenopathy, hepatomegaly, or splenomegaly. Bone marrow aspiration, flow cytometry, biopsy, and immunohistochemistry confirmed DLBCL. Two cycles of rituximab, cyclophosphamide, doxorubicin, vincristine, and prednisone were administered. Blood cell numbers and hyperbilirubinemia improved. Although the patient did not completely recover, he survived for at least 3 years after chemotherapy and receiving blood transfusions. PBM DLBCL is a distinct, aggressive lymphoma characterized by lymphoma cells only in the bone marrow and effectively treated via chemotherapy. Prognoses for PBM DLBCL vary.
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Affiliation(s)
- Y Hu
- Department of Hematology, Beijing Chaoyang Hospital Affiliated to Capital Medical University, Beijing, China
| | - S L Chen
- Department of Hematology, Beijing Chaoyang Hospital Affiliated to Capital Medical University, Beijing, China
| | - Z X Huang
- Department of Hematology, Beijing Chaoyang Hospital Affiliated to Capital Medical University, Beijing, China
| | - W Gao
- Department of Hematology, Beijing Chaoyang Hospital Affiliated to Capital Medical University, Beijing, China
| | - N An
- Department of Hematology, Beijing Chaoyang Hospital Affiliated to Capital Medical University, Beijing, China
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Li LL, Dong Y, Wang RX, An N, Yun X, Liu RZ. Sperm aneuploidy and implications for genetic counseling in a pedigree of three t(1;3) balanced translocation carriers. Genet Mol Res 2015; 14:5003-9. [PMID: 25966275 DOI: 10.4238/2015.may.12.3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
A reciprocal translocation between the short arm of chromosome 1 and the long arm of chromosome 3 was observed in a pedigree of three carriers (proband, and his brother and mother). In this study, the three carriers had different clinical manifestations: the proband with infertility, his brother with spousal miscarriages, and his mother with no adverse reproductive history. Cytogenetic analysis of metaphase chromosomes was performed, and triple-color fluorescence in situ hybridization was applied to the detection of aneuploidy sperm related to the interchromosomal effect (ICE). An increase of aneuploidy of chromosome 21 in the proband and aneuploidy of chromosomes 13, 21, and Y in the brother were observed. Since patients with reciprocal translocations and spermatogenetic impairment are candidates, with their partners, for intracytoplasmic sperm injection, the study of the level of sperm aneuploidy rates would provide useful information for couples at risk, as well as contributing to a better understanding of the ICE.
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Affiliation(s)
- L-L Li
- Center for Reproductive Medicine, Center for Prenatal Diagnosis, The First Hospital, Jilin University, Changchun, China
| | - Y Dong
- Center for Reproductive Medicine, Center for Prenatal Diagnosis, The First Hospital, Jilin University, Changchun, China
| | - R-X Wang
- Center for Reproductive Medicine, Center for Prenatal Diagnosis, The First Hospital, Jilin University, Changchun, China
| | - N An
- Center for Reproductive Medicine, Center for Prenatal Diagnosis, The First Hospital, Jilin University, Changchun, China
| | - X Yun
- Center for Reproductive Medicine, Center for Prenatal Diagnosis, The First Hospital, Jilin University, Changchun, China
| | - R-Z Liu
- Center for Reproductive Medicine, Center for Prenatal Diagnosis, The First Hospital, Jilin University, Changchun, China
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Finn M, An N, Voutchkova-Kostal A. Immobilization of imidazolium ionic liquids on hydrotalcites using silane linkers: retardation of memory effect. RSC Adv 2015. [DOI: 10.1039/c4ra13839b] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
We report a new covalent surface immobilization of silane-modified imidazolium ionic liquids on hydrotalcite-like materials (HTs) and provide detailed characterization of the resulting surface chemistry using PXRD, CP-MAS, TGA and FT-IR.
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Affiliation(s)
- M. Finn
- Department of Chemistry
- George Washington University
- Washington DC 20052
- USA
| | - N. An
- Department of Chemistry
- George Washington University
- Washington DC 20052
- USA
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An N, Li LL, Zhang XY, Sun WT, Liu MH, Liu RZ. Result and pedigree analysis of spontaneously abortion villus chromosome detecting by FISH. Genet Mol Res 2015; 14:16662-6. [DOI: 10.4238/2015.december.11.13] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Shi Z, An N, Lu BM, Zhou N, Yang SL, Zhang B, Li CY, Wang ZJ, Wang F, Wu CF, Bao JK. Identification of novel kinase inhibitors by targeting a kinase-related apoptotic protein-protein interaction network in HeLa cells. Cell Prolif 2014; 47:219-30. [PMID: 24645986 PMCID: PMC6496802 DOI: 10.1111/cpr.12098] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2013] [Accepted: 12/28/2013] [Indexed: 12/15/2022] Open
Abstract
OBJECTIVES Protein kinases orchestrate activation of signalling cascades in response to extra- and intracellular stimuli for regulation of cell proliferation. They are directly involved in a variety of diseases, particularly cancers. Systems biology approaches have become increasingly important in understanding regulatory frameworks in cancer, and thus may facilitate future anti-cancer discoveries. Moreover, it has been suggested and confirmed that high-throughput virtual screening provides a novel, effective way to reveal small molecule protein kinase inhibitors. Accordingly, we aimed to identify kinase targets and novel kinase inhibitors. MATERIALS AND METHODS A series of bioinformatics methods, such as network construction, molecular docking and microarray analyses were performed. RESULTS In this study, we computationally constructed the appropriate global human protein-protein interaction network with data from online databases, and then modified it into a kinase-related apoptotic protein-protein interaction network. Subsequently, we identified several kinases as potential drug targets according to their differential expression observed by microarray analyses. Then, we predicted relevant microRNAs, which could target the above-mentioned kinases. Ultimately, we virtually screened a number of small molecule natural products from Traditional Chinese Medicine (TCM)@Taiwan database and identified a number of compounds that are able to target polo-like kinase 1, cyclin-dependent kinase 1 and cyclin-dependent kinase 2 in HeLa cervical carcinoma cells. CONCLUSIONS Taken together, all these findings might hopefully facilitate discovery of new kinase inhibitors that could be promising candidates for anti-cancer drug development.
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Affiliation(s)
- Z. Shi
- School of Life Sciences & Key Laboratory of Bio‐resourcesMinistry of EducationSichuan UniversityChengdu610064China
- School of Life SciencesGuizhou Normal UniversityGuiyang550001China
| | - N. An
- School of Life Sciences & Key Laboratory of Bio‐resourcesMinistry of EducationSichuan UniversityChengdu610064China
| | - B. M. Lu
- School of Life Sciences & Key Laboratory of Bio‐resourcesMinistry of EducationSichuan UniversityChengdu610064China
| | - N. Zhou
- School of Life Sciences & Key Laboratory of Bio‐resourcesMinistry of EducationSichuan UniversityChengdu610064China
| | - S. L. Yang
- School of Life SciencesGuizhou Normal UniversityGuiyang550001China
| | - B. Zhang
- School of Life Sciences & Key Laboratory of Bio‐resourcesMinistry of EducationSichuan UniversityChengdu610064China
| | - C. Y. Li
- School of Life Sciences & Key Laboratory of Bio‐resourcesMinistry of EducationSichuan UniversityChengdu610064China
| | - Z. J. Wang
- School of Life Sciences & Key Laboratory of Bio‐resourcesMinistry of EducationSichuan UniversityChengdu610064China
| | - F. Wang
- China National Biotec Group Company LimitedBeijing100029China
| | - C. F. Wu
- School of Life Sciences & Key Laboratory of Bio‐resourcesMinistry of EducationSichuan UniversityChengdu610064China
| | - J. K. Bao
- School of Life Sciences & Key Laboratory of Bio‐resourcesMinistry of EducationSichuan UniversityChengdu610064China
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Li CY, Wang Y, Wang HL, Shi Z, An N, Liu YX, Liu Y, Zhang J, Bao JK, Deng SP. Molecular mechanisms of Lycoris aurea agglutinin-induced apoptosis and G2 /M cell cycle arrest in human lung adenocarcinoma A549 cells, both in vitro and in vivo. Cell Prolif 2013; 46:272-82. [PMID: 23692086 DOI: 10.1111/cpr.12034] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2012] [Accepted: 02/06/2013] [Indexed: 11/28/2022] Open
Abstract
OBJECTIVES Lycoris is aurea agglutinin (LAA) has attracted rising attention due to its remarkable bioactivities. Here, we aimed at investigating its anti-tumor activities. MATERIAL AND METHODS In vitro methods including MTT, cellular morphology observation, FCM and immunoblotting were performed. In vivo methods like detection of tumor volume, body weight and survival ratio, as well as TUNEL staining were performed. RESULTS AND CONCLUSION LAA triggers G2 /M phase cell cycle arrest via up-regulating p21expression as well as down-regulating cdk-1cyclinA singling pathway, and induces apoptotic cell death through inhibiting PI3K-Akt survival pathway in human lung adenocarcinoma A549 cells. While LAA has no significant cytotoxic effect toward normal human embryonic lung fibroblast HELF cells, and moreover, LAA could amplify the antineoplastic effects of cisplatin toward A549 cells. Lastly LAA also bears anti-cancer and apoptosis-inducing effects in vivo, and it could decrease the volume and weight of subcutaneous tumor mass obviously as well as expand lifespan of mice. These findings may provide a new perspective for elucidating the complicated molecular mechanisms of LAA-induced cancer cell growth-inhibition and death, providing a new opportunity of LAA as a potential candidate anti-neoplastic drug for future cancer therapeutics.
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Affiliation(s)
- C-Y Li
- School of Life Sciences & Key Laboratory of Bio-resources, Ministry of Education, Sichuan University, Chengdu 610064, China
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40
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Shi Z, An N, Zhao S, Li X, Bao JK, Yue BS. In silico analysis of molecular mechanisms of legume lectin-induced apoptosis in cancer cells. Cell Prolif 2013; 46:86-96. [PMID: 23294355 DOI: 10.1111/cpr.12009] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2012] [Accepted: 10/20/2012] [Indexed: 12/14/2022] Open
Abstract
OBJECTIVES The legume lectin family, one of the most extensively studied plant lectin families, has received increasing attention for the remarkable anti-tumor activities of its members for binding specific cancer cell surface glycoconjugates. MicroRNAs, a class of small, non-coding RNAs, control translation and stability of mRNAs at post-transcriptional and translational levels. To date, accumulating evidence has revealed that microRNAs are involved in progression of a number of human diseases, especially cancers. However, the molecular manners of microRNA-modulated apoptosis in legume lectin-treated cancer cells are still under investigation. MATERIALS AND METHODS We performed in silico analyses to study the interactions between three typical legume lectins (ConA, SFL and SAL) and some specific sugar-containing receptors (for example, EGFR, TNFR1, HSP70 and HSP90). Additionally, we predicted some relevant microRNAs which could significantly regulate these aforementioned targetreceptors and thus inhibiting down-stream cancer-related signaling pathways. RESULTS The results showed that these three legume lectins could competitively bind sugar-containing receptors such as EGFR, TNFR1, HSP70 and HSP90 in two ways, via anti-apoptotic or survival pathways. On the one hand, the legume lectins could induce cancer cell death through triggering receptor-mediated signaling pathways, which resulted from indirect binding between legume lectins and mannoses resided in receptors. On the other hand, direct binding between legume lectins and receptors could lead to steric hindrance, which would disturb efficient interactions between them, and thus, the legume lectins would induce cancer cell death by triggering receptor-mediated signaling pathways. In addition, we identified several relevant microRNAs that regulated these targeted receptors, thereby ultimately causing cancer cell apoptosis. CONCLUSIONS These findings provide new perspectives for exploring microRNA-modulated cell death in legume lectin-treated cancer cells, which could be utilized in combination therapy for future cancer drug development.
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Affiliation(s)
- Z Shi
- School of Life Sciences and Key Laboratory of Bio-resources and Eco-environment, Ministry of Education, Sichuan University, Chengdu, 610064, China
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41
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An N, Lin YW, Liu A, Lilly M, Mahajan S, Kraft A, Kang Y. Serine/Threonine Pim Kinases Play an Important Role in Maintaining the Number and Function of Hematopoietic Stem Cells. Biol Blood Marrow Transplant 2012. [DOI: 10.1016/j.bbmt.2011.12.457] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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42
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An N, Bland A, Lazarchick J, Li Z, Kraft A, Arthur J, Kang Y. Using Proteomics Analysis to Identify Novel Proteins in Marrow Niche Microenvironment That Contribute to the Enhanced Donor Cell Engraftment with Plerixafor Treatment. Biol Blood Marrow Transplant 2012. [DOI: 10.1016/j.bbmt.2011.12.499] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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43
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Schwartz A, An N. 149: Utilization of an Intake Model to Cope With Increasing Patient Volumes In the Emergency Department. Ann Emerg Med 2010. [DOI: 10.1016/j.annemergmed.2010.06.196] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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44
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Yan X, Gao Y, Jiang G, Gao M, An N. P1121 The significance of different management of primary cytoreductive surgery in advanced stage epithelial ovarian cancer. Int J Gynaecol Obstet 2009. [DOI: 10.1016/s0020-7292(09)62605-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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45
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Abstract
A new diarylheptanoid, along with five known diarylheptanoids, was isolated from the rhizomes of Alpinia officinarum (Zingiberaceae). The structure of the new compound was determined to be trans,trans-1(3'-methoxy-4'-hydroxyphenyl)-7-phenyl-5-ol-4,6-dien-3-heptanone on the basis of spectral and chemical evidence.
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Affiliation(s)
- N An
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100094, China
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46
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Cheng H, Jiang W, Phillips F, Haydon R, Peng Y, Zhou L, Luu H, An N, Breyer B, Vanichakarn P, Szatkowski J, Park J, He T. Osteogenic activity of the fourteen types of human bone morphogenetic proteins (BMPs). Urol Oncol 2004. [DOI: 10.1016/j.urolonc.2003.12.008] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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47
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Zhou L, An N, Jiang W, Haydon R, Cheng H, Zhou Q, Breyer B, Feng T, He TC. Fluorescence-based functional assay for Wnt/beta-catenin signaling activity. Biotechniques 2002; 33:1126-8, 1130, 1132 passim. [PMID: 12449394 DOI: 10.2144/02335dd07] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Aberrant activation of beta-catenin signaling has been implicated in the development of human cancers. As a Wnt signal transducer, beta-catenin forms a complex with the lymphocyte enhancer-binding factor/T cell factor transcription factor and activates downstream targets that promote cell proliferation. Here we developed a Wnt-dependent beta-catenin-mediated heterologous transactivation system, which consisted of a chimeric transcription factor constructed by fusing the GAL4 DNA-binding domain with the full-length beta-catenin, and a GAL4-responsive reporter expressing GFP. The chimeric transcription factor was highly unstable and exerted no detectable transactivating effect on the GAL4-responsive reporter. However, lithium and Wnt1 significantly stabilized this chimeric transactivator, indicating that this transactivation system is regulated by beta-catenin in a Wnt-responsive fashion. Thus, this transactivation system could be used as a functional reporter to identify potential upstream factors that deregulate beta-catenin signaling during tumorigenesis, as well as to screen for potential anti-cancer agents that specifically inhibit beta-catenin signaling in human tumors.
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Affiliation(s)
- L Zhou
- The University of Chicago Medical Center, IL, USA
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48
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An N, Xu C, Zhang Z. [Cloning and expression of human TNFR (P55)-IgG Fc fusion protein in eukaryotic cells]. Zhonghua Shi Yan He Lin Chuang Bing Du Xue Za Zhi 2001; 15:116-7. [PMID: 11436637] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/20/2023]
Abstract
OBJECTIVE To express soluble biologically active TNF receptor protein in eukaryotic cells, which can inhibit cytotoxic activity of TNF. METHODS PCR amplified the extra-cellular region of TNF receptor P55 and IgG Fc gene. Then the two were linked through an oligomer encoding a thrombin-sensitive peptide linker and cloned into eukaryotic expression vector pcDNA3.1 (+). The eukaryotic expression plasmid pcDNA3. 1/TI was then transfected to the mammalian cell line COS7 and BHK. Using the G418 system, BHK cell clones were selected and can continuously secrete biological protein in large amount. RESULTS The expressed protein was fused with IgG Fc and secreted into the cell culture supernatant. It has good antigenicity and binding ability to TNF. It can also inhibit the cytotoxic activity of TNF on L929 cell. CONCLUSION The TNFR-IgG Fc fusion protein expressed in eukaryotic cells has biological activities of human TNF receptor P55.
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Affiliation(s)
- N An
- State Key Laboratory of Molecular Virology and Genetic Engineering, Institute of Virology, Chinese Academy of Preventive Medicine, Beijing 100052, China
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49
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Dou L, Liang M, An N. [Generation of monoclonal antibody Fab fragments to parathyroid hormone related protein by phage display technology]. Zhonghua Shi Yan He Lin Chuang Bing Du Xue Za Zhi 2000; 14:121-4. [PMID: 11503039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
Abstract
OBJECTIVE To develop monoclonal antibody Fab fragments using display technique. METHODS The mouse IgG Fab genes of heavy and light chains were amplified from spleen cells of a parathyroid hormone-related protein (PTHrP) immunized mouse. The combinatorial phage antibody library was prepared by inserting both heavy and light chain Fab genes into phagemid vector pComb3 and followed by infection of helper phage. The library was selected by purified recombinant PTHrP. RESULTS The combinatorial phage antibody library was constructed successfully and the specific mouse Fabs to PThrP were selected and expressed in E. coli. CONCLUSIONS The selected specific mouse Fabs can recognize PTHrP with high specificity.
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Affiliation(s)
- L Dou
- Institute of Virology, Chinese Academy of Preventive Medicine, Beining 100052, China
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50
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Dou L, Zhang Z, Liu H, Zhou X, Xiong W, An N, Yao L, Hou Y. Cloning and expression of truncated PTHrP receptor in Escherichia coli. Chin J Biotechnol 2000; 15:91-7. [PMID: 10719628] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/15/2023]
Abstract
To evaluate the effects of recombinant soluble parathyroid hormone related protein receptor(sPTHrPR), the RNA prepared from renal cell carcinoma was reverse-transcribed and amplified by a polymerase chain reaction(PCR). A 543 base pair fragment corresponding to extracellular domain of PTHrPR was obtained and cloned. Sequencing was performed by the dideoxy chain-termination method. Comparison of the nucleic acid sequence with the published data revealed that only one nucleotide had changed. A high level expression vector referred to as pET-3a/sPTHrPR was constructed. The binding specificity of the expression products was proved by indirect ELISA. Our preliminary experiment also showed that the expression products can block the biological activity of PTHrP.
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Affiliation(s)
- L Dou
- National Laboratory of Molecular Virology and Genetic Engineering, Beijing, China
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